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SIARETRON 1000 – 1100 - 3000
Service Manual
A/D channels testing.
The testing phase of A/D channels starts by pressing the ALARM RESET (SW20) button. On O
(DS9/10) and SIMV RATE (DS11/12) displays respectively appear messages: An and In , on RATE (DS3/4)
display appears message: Ch , on % INSP (DS5/6) display appears the channel on which the monitoring is
effected and on MINUTE VOLUME (DS13/14/15) display appears the analog/digital conversion value. With
the % INSP
(SW14) and
following checks:
a)
Ch 0 (pressure): vary the inlet pressure of MPX10 sensor on the LV200I/O board from 0 to 80 cm of
H2O and verify that the A/D value on the MINUTE VOLUME (DS13/14/15) display changes from 20
± 1 to 100 ± 2.
b)
Ch 1 (oxymeter): apply to the CN12 connector an electric power variable from 0 to 75 mV between
the pin 4 (+) and the pin 1 (GND); verify that the corresponding A/D value changes from 0 to 225 ± 2.
c)
Ch 2 (MINUTE VOLUME potentiometer): rotate the potentiometer (POT) of MINUTE VOLUME
regulation and verify that the corresponding A/D value changes from 0 to 1023 (023 on display).
Ch 3 : not used.
d)
Ch 4 (AIR flowmeter): apply to the CN13 connector an electric power variable from 0 to 5 V between
the 4 (+) pin and the 2 (GND) pin; verify that the corresponding A/D value changes from 0 to
1000 ± 2.
e)
Ch 5 (O2 flowmeter): apply to the CN14 connector an electric power variable from 0 to 5 V between
the pin 4 (+) and the pin 2 (GND); verify that the corresponding A/D value changes from 0 to
1000 ± 2.
After the test verify the machine switch-off by pressing ON/OFF (SW1) button.
5)
If the testing result is positive, put on the board a green label indicating the identification number, the date
and tester technician signature.
SIARETRON_SE3_en
(SW17) switches the A/D channel can be adjusted from 0 to 5; perform the
17 / (72 )
CONC
2
( rev.3) 30.06.2004
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